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Fair Value Measurements - Summary of Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - Fair Value, Recurring [Member] - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Assets: |  |
US Government Agency securities | $ 12,985 |
US Government Treasury securities | 4,942 |
Small Business Administration loan pools |  | $ 843
Obligations of state and political subdivisions | 47,045 | 40,169
Mortgage backed securities in government-sponsored entities | 48,181 | 37,801
Other securities | 2,337 |
Total | 115,490 | 78,813
Fair Value, Inputs, Level 1 [Member] |  |
Assets: |  |
US Government Agency securities | 0 |
US Government Treasury securities | 0 |
Small Business Administration loan pools |  | 0
Obligations of state and political subdivisions | 0 | 0
Mortgage backed securities in government-sponsored entities | 0 | 0
Other securities | 0 |
Total | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Assets: |  |
US Government Agency securities | 12,985 |
US Government Treasury securities | 4,942 |
Small Business Administration loan pools |  | 843
Obligations of state and political subdivisions | 47,045 | 40,169
Mortgage backed securities in government-sponsored entities | 48,181 | 37,801
Other securities | 2,337 |
Total | 115,490 | 78,813
Fair Value, Inputs, Level 3 [Member] |  |
Assets: |  |
US Government Agency securities | 0 |
US Government Treasury securities | 0 |
Small Business Administration loan pools |  | 0
Obligations of state and political subdivisions | 0 | 0
Mortgage backed securities in government-sponsored entities | 0 | 0
Total | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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